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Semiconductive shielding composite material, preparation method thereof and application thereof in power cables

A composite material and semi-conductive technology, which is applied in the field of semi-conductive shielding composite material preparation for power cables, can solve the problems of large amount of carbon black filling, unsatisfactory performance and easy agglomeration of semi-conductive shielding materials, so as to improve the electrical conductivity and mechanical properties. The effect of excellent performance, mechanical properties and good compatibility

Active Publication Date: 2020-07-24
STATE GRID HUNAN ELECTRIC POWER +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the shortcomings of semi-conductive shielding materials for power cables, such as large filling amount of carbon black, easy agglomeration, and unsatisfactory performance, the first purpose of the present invention is to provide a semi-conductive shielding composite material, which aims to improve the dispersion of CNTs and reduce the addition of CNTs. quantity, and improve electrical conductivity and mechanical properties

Method used

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  • Semiconductive shielding composite material, preparation method thereof and application thereof in power cables
  • Semiconductive shielding composite material, preparation method thereof and application thereof in power cables

Examples

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Effect test

Embodiment 1

[0042] The mass percentage of main raw materials is as follows: EVA98%; CNT 1%; GO 1%;

[0043] The operation steps adopt:

[0044] (1) Preparation of GO-CNT / EVA mixture: First, EVA was added into xylene and mechanically stirred at 60°C for 30 minutes to obtain EVA solution, then the GO-CNT / xylene uniform dispersion solution obtained after ultrasonication for 10 minutes was added to EVA solution, Continue stirring and mixing for 30 minutes to obtain a GO-CNT / EVA mixture, and finally pour the mixture into ethanol for flocculation and drying to obtain a GO-CNT / EVA mixture;

[0045] (2) Compression molding: The GO-CNT / EVA mixture obtained in step (1) was preheated at 160 °C for 5 min, then hot-pressed at 10 MPa for 10 min, and finally cooled to room temperature to obtain the target product.

Embodiment 2

[0047] Others are the same as in Example 1, the ratio of raw materials is EVA96%; CNT 2%; GO 2%;

Embodiment 3

[0049] Others are the same as in Example 1, the ratio of raw materials is EVA94%; CNT 3%; GO 3%.

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Abstract

The invention relates to the technical field of semiconductive shielding composite materials, in particular to a semiconductive shielding composite material for a power cable, and the method comprisesthe following components in parts by weight: 94-98% of ethylene-vinyl acetate copolymer (EVA), 1-3% of carbon nanotube (CNT) and 1-3% of graphene oxide (GO). The preparation process comprises the following steps: (1) preparing a GO-CNT / EVA mixture; and (2) performing compression molding. According to the invention, the high-conductivity CNT is used as a conductive filler, the EVA is used as a matrix material, and the GO is used as a CNT and EVA matrix interface improver, so that an efficient conductive network is constructed under the condition of low CNT content, and the semiconductive shielding composite material with good conductivity and mechanical properties is obtained. The semiconductive shielding composite material for the power cable is simple to prepare, low in production cost and easy to realize mass production in industry.

Description

technical field [0001] The invention relates to the field of preparation of a semi-conductive shielding composite material for power cables, in particular to graphene oxide (hereinafter referred to as GO)-carbon nanotube (hereinafter referred to as CNT) / ethylene-vinyl acetate copolymer (hereinafter referred to as EVA) power cables Use semi-conductive shielding compound. Background technique [0002] With the rapid growth of my country's economy and the advancement of power technology, high-voltage and ultra-high voltage transmission technology has attracted more and more attention because of its advantages such as long transmission distance, large transmission capacity and low loss. However, under high voltage, the cable insulation is prone to generate space charges, resulting in distortion of the electric field, and even breakdown of the insulation and damage to the cable. The semi-conductive shielding layer can make the electric field distribution more uniform to prevent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K3/04
CPCC08K3/041C08K3/042C08L23/0853C08K2201/003C08K2201/004C08K2201/011C08K2201/001C08L2203/202
Inventor 万代齐飞周恒逸赵邈段绪金彭思敏由凯彭涛
Owner STATE GRID HUNAN ELECTRIC POWER
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